Finding the Fourth Proportional to 78,880,955.42, 118,859,853.76 and 64,819,026.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,880,955.42 : 118,859,853.76 = 64,819,026.56 : x
2. Step 2: Convert to fraction form
   78,880,955.42/118,859,853.76 = 64,819,026.56/x
3. Step 3: Cross multiply
   78,880,955.42x = 118,859,853.76 × 64,819,026.56
4. Step 4: Simplify right side
   78,880,955.42x = 7,704,380,017,463,061
5. Step 5: Solve for x
   x = 7,704,380,017,463,061/78,880,955.42
6. Step 6: Final answer
   x = 97,670,977.44